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The Danfoss 003N0050 is the commercial reference for the Danfoss KPI 35 electronic room thermostat — a bimetal-sensing, line-voltage thermostat designed for space temperature control in heating and cooling systems. It features a 5–35 °C adjustable temperature range, SPDT (Single Pole Double Throw) switch contacts rated at 10(4)A @ 230V AC, and is intended for surface mounting in residential, commercial, or light industrial HVAC zones. The thermostat operates on a 2-wire or 3-wire control scheme depending on whether it switches a pump, fan coil, or zone valve directly.
Technical Specifications (Electrical & Control)
Parameter
Specification
Danfoss Code / Ref
003N0050 (KPI 35 — White, Standard European Version)
Surface Mount (Back Box Compatible — typically Ø60 mm flush box or surface backplate included)
Housing Material
ABS Plastic (White, RAL 9010)
Cable Entry
Rear & Bottom Knockouts (PG glands not always included)
Degree of Protection
IP30 (Indoor Use Only)
Dimensions (H×W×D)
~86 × 86 × 38 mm (Typical KPI 35)
Weight
~0.15 kg
Standards / Approvals
CE, EN 60730-1 (Class I Control Device), RoHS
Included Accessories
Mounting screws, setpoint scale overlay
Key Features
SPDT Switching: Provides both heating (NO) and cooling/alarm (NC) contact from one device — useful for 3-wire fan-coil or heat/cool changeover control.
High Contact Rating: 10A resistive allows direct switching of small circulation pumps, zone valve motors (check inrush!), or fan relays without an intermediate contactor.
Simple Calibration: Setpoint knob with clear °C scale; no batteries or external power required (purely electromechanical).
Wide Application Range: 5–35°C span covers frost protection (5°C) through comfort heating and moderate cooling setpoints.
Applications
Hydronic Heating Zones: Switching zone valve motors (e.g., VG) or circulating pump relays in underfloor or radiator systems.
Fan Coil Units (FCU): 3-wire control — NO contact to heating valve / NC contact to cooling stage or fan interlock.
Server / Plant Room Frost Protection: Setting to 5–8°C to energize trace heating or space heaters.
Retrofit Thermostat: Direct replacement for older line-voltage room stats in European-style HVAC installs.
Note: The 003N0050 (KPI 35) is an electromechanical bimetal SPDT room thermostat. For a digital programmable / PI-controlled version with LCD and 0–10V/relay output, see the Danfoss RTD / ECL Comfort / Icon series. If you need a 2-wire NO-only (SPST) version, the KPI 30 (003N0040) is the single-pole variant. Always verify valve/pump coil inrush current doesn't exceed the 4A inductive rating before direct switching.
Founded in 2012, ACH is a top-tier distributor of industrial automation products, supplying genuine devices from leading brands like ABB, P+F, E&H, AB, MTL to emerging markets worldwide. Our mission is to provide 100% Genuine products at the most competitive prices, helping customers reduce costs and strengthen their market position.
Frequently Ask & Questions
Are preferential prices available?
Long-term brand partners can get competitive product prices. At the same time, ACH controls the profit per order to 5%, providing the most competitive prices.
Are the Products Genuine OEM Units?
Yes, all products from ACH are certified genuine OEM units. We acquire our inventory through official OEM channels and trusted third-party suppliers, ensuring every item is authentic and reliable.
How will you arrange shipment?
We'll handle the shipping for you. Through our partnerships, we can secure competitive rates with major carriers like FedEx, DHL, TNT, and UPS, ensuring a smooth and cost-effective delivery.
What is the warranty of goods?
One-year Warranty.
How long is the logistics cycle of the product?
Products are divided into spot and futures, and the delivery period of different brands of products is also different. For details, please contact the ACH business manager.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Agent,Importer,Trading Company
Year Established:
2012
Total Annual:
2000000-3000000
Employee Number:
>50
Ecer Certification：
Verified Supplier
A Decade of Global Excellence in Electromechanical Trade
ACH established in 2012 with offices in Shenzhen and Hong Kong, is a high-efficiency multi-brand distributor of industrial automation products.
We specialize in supplying world-leading brands such as Bradley,Pe... A Decade of Global Excellence in Electromechanical Trade
ACH established in 2012 with offices in Shenzhen and Hong Kong, is a high-efficiency multi-brand distributor of industrial automation products.
We specialize in supplying world-leading brands such as Bradley,Pe...
